Earl sherwood and lorenzo lake



(No Model.)

B. SHERWOOD -& L. LAKE. LIFTING JACK.

No. 543,407. Patented July 23, 1895.

UNITED, STATES PATENT OFFICE. v

EARL SHERWOOD AND LORENZO LAKE, OF HONESDALE, PENNSYLVANIA,

ASSIGNORS OF ONE-HALF TO WALTER A. WOOD AND N. E.BIGELOW,

OF SAME PLACE. A

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent N 0. 543,407, dated July23, 1895.

I Application filed March 5, 1895. Serial No. 540,646. (No model.) 7

To all whom it may concern.-

Be it known that we, EARL SHERWOOD and LORENZO LAKE, citizens of theUnited States, residing at Honesdale, in the county of Wayne and Stateof Pennsylvania, have invented a raised position after theoperating-lever has been depressed, and which shall be simple inconstruction and durable in practice.

Our invention consists in the combination with an inclined post orstandard provided with a broad base having a triangular extension forgiving the necessary strength thereto, of a lifting arm or bar pivotedto the post or standard, and having a corrugated face-plate,

an operating-lever also pivoted to said inclined standard, andan openlink interposed between the lifting-bar and the operating-lever, andprovided with a stop for limiting the upward movement of theoperating-lever, and in certain details of construct-ion and arrangementof parts hereinafter described and claimed.

In the accompanying drawings, Figure lis a perspective view of ourimproved wagonjack complete. Fig. 2 is a side elevation of the same withone side bar of the open link omitted to show the relation of the partsand the means for automatically locking the lifting-bar in its raisedposition.

Similar numerals of reference indicate corresponding parts in bothfigures of the drawlngs.

1 represents the base of our lifting-jack, which has sufficient lengthand width to properly steady the jack and hold it in an uprightposition. v

2 indicates a triangular extension projecting upwardly from the base 1and adapted to receive and support an inclined postor standard 3 boltedthereto, as shown. We prefer to make the inclined post or standard 3 oftwo parallel bars adapted to stride and embrace the triangular extension2 of the base, and to .oted thereto by a bolt 7.

8 indicates an open link consisting of two separate andsubstantially-parallel side-bars, as shown in Fig. 1. The link 8pivotally connects the lifting-bar 6 with one end of the opcrating-leverby means of the through-bolts 9 and 10. a

11 indicates a face-plate made of soft iron or other suitable metal,capable of being bent -to form at suitable intervals corrugations orteeth, the purpose 'of which is. to engage the axle or other convenientpoint of a vehicle and prevent the same from accidentally slidingtherefrom. The face-plate 11 may be screwed or otherwise secured to theupper side of the lifting-bar 6.

12 is a stop in the form of a small plate or cross-bar secured upon theupper faces of and connecting the two side bars of the open link 8.

The operating-lever 4 is made to project at its end beyond the pivotalbolt 10 to such extent that when the parts are .caused to assume theposition indicated in Fig. 2, the raised position, said projecting-endof the opcrating-lever 4 will rest against the lower face of the stop 12and bar 6, thereby limiting the further progress of the lever 4.

The parts of our lifting-jack, and the angles thereof with relation toeach other, are so arranged that the pivot 10, when the bar 6 is raisedto its highest position, will be out of line with and above the line ofthe pivots 5 and 9. By such arrangement it will be evident that it isimpossible to depress the lifting-bar 6, thus obviating accidents,damage to the vehicle, and loss of time incident to lifting-jacksincapable of being locked in raised position.

By means of the construction above described, a simple and durablelighting-jack is provided, which is adapted for use in connection withthe lowest barouche or the highest lumber-wagon. It will-also beapparent that the device Will be doubly and automatically locked in itsraised position by means of the stop 12 and the engagement between theend of the operating-lever and the lifting-bar.

Having described our invention, we claim In a lifting jack, an elongatedbase, and an inclined post or standard secured thereto, in combinationwith a lifting bar pivoted to said post or standard, a corrugated platesecured to the upper face of the lifting bar, an operating lever alsopivoted to said post or standard, an open link comprising two sidemembers disposed upon opposite sides of and pivotally connecting thelifting bar with one end of the operating lever, and a stop in the formof a plate or cross bar connecting the side

